Quote by Diane Ravitch
The person who knows HOW will always have a job. The person who knows WHY will always be his boss.

Summary
This quote emphasizes the importance of understanding the underlying reasons or principles behind a task or job. While knowing how to perform a job will secure employment, having a deeper understanding of why things work a certain way makes one more valuable and influential. Knowing why allows for innovation, problem-solving, and effective leadership, ultimately placing individuals in positions where they can guide and make important decisions, rather than simply following instructions.